H04B 3/50
Systems for transmission between fixed stations via two-conductor transmission lines
Official title: Systems for transmission between fixed stations via two-conductor transmission lines (H04B3/54 takes precedence)
H04B3/50 (Systems for transmission between fixed stations via two-conductor transmission lines) appears on 196 US grants and 210 published applications in this corpus.
Search patents in H04B- Granted patents
- 196
- Published applications
- 210
- Assignees
- 144
- Inventors
- 451
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 1 | 2 |
| 2006 | 1 | 1 |
| 2007 | 2 | 4 |
| 2008 | 1 | 4 |
| 2009 | 2 | 2 |
| 2010 | 4 | 3 |
| 2011 | 1 | 5 |
| 2012 | 3 | 2 |
| 2013 | 6 | 14 |
| 2014 | 10 | 23 |
| 2015 | 14 | 12 |
| 2016 | 17 | 22 |
| 2017 | 23 | 21 |
| 2018 | 19 | 20 |
| 2019 | 21 | 16 |
| 2020 | 21 | 12 |
| 2021 | 16 | 13 |
| 2022 | 7 | 9 |
| 2023 | 5 | 6 |
| 2024 | 3 | 8 |
| 2025 | 7 | 3 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Transceiver with shared filter for both transmit and receive modes24 Feb 2026US 12,562,777 B2Apple Inc.
- Test monitor including signal separator and data recorder13 Jan 2026US 12,526,010 B2Tektronix, Inc.
- Amplifier for extended spectrum DOCSIS9 Dec 2025US 12,493,403 B2ARRIS Enterprises LLC
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- Automotive ethernet using asymmetric concurrent transmission (ACT)19 Mar 2026US 2026/0081638 A1Infineon Technologies Americas Corp.
- Amplifier for extended spectrum docsis12 Mar 2026US 2026/0072583 A1ARRIS Enterprises LLC
- Reducing crosstalk on duplex signal communication channels15 May 2025US 2025/0158794 A1International Business Machines Corporation
- Method for coding communication conductors of a linear sensor belonging to a system3 Apr 2025US 2025/0110009 A1Ttk
Most cited
By later US patents
- Method and apparatus for exchanging communication signals559US 9,461,706 B1AT&T Intellectual Property I, L. P. · 2016
- Directional coupling device and methods for use therewith463US 9,705,561 B2AT&T Intellectual Property I, L. P. · 2017
- RF communication signal distribution system and method155US 5,774,789 AAllen Telecom Inc. · 1998
- Subsea communications system139US 7,261,162 B2Schlumberger Technology Corporation · 2007
- Methods and apparatus for regulating a magnetic flux in an inductive power supply119US 10,581,275 B2AT&T Intellectual Property I, L. P. · 2020